Illuminated chromatic emblem assembly with micro LEDs

ABSTRACT

An illuminated emblem assembly that includes a power source; a light-producing assembly that is coupled to the power source, supported by a backing member and comprises a plurality of light-emitting diode sources; a chromatic layer comprising an emblem shape over the light-producing assembly, wherein the shape is visible under ambient lighting; and a polycarbonate sealing structure over the chromatic layer that seals the backing member, the light-producing assembly, and the chromatic layer. Further, the sealing structure can comprise a design feature. In addition, the plurality of light-emitting diode sources can be dispersed in the light-producing assembly. The light-emitting diode sources can also be micro-sized elements comprising gallium nitride that are arranged on a positive electrode layer in the form of an ink.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a continuation-in-part application thatclaims priority to and the benefit under 35 U.S.C. § 120 of: U.S. patentapplication Ser. No. 14/275,342, filed on May 12, 2014, entitled“ILLUMINATED CHROMATIC EMBLEM ASSEMBLY WITH MICRO LEDS”; now issued asU.S. Pat. No. 9,481,296, and U.S. patent application Ser. No.14/276,434, filed on May 13, 2014, entitled “ILLUMINATED CHROMATICEMBLEM ASSEMBLY,” now issued as U.S. Pat. No. 9,834,136, both of whichare continuation-in-part applications of U.S. patent application Ser.No. 13/526,857, filed on Jun. 19, 2012, entitled “ILLUMINATED CHROMATICVEHICLE EMBLEM,” now issued as U.S. Pat. No. 8,752,989, the entiredisclosures of which are hereby incorporated herein by reference.

FIELD OF THE INVENTION

The present invention generally relates to an emblem, and moreparticularly relates to an illuminated, chromatic emblem with microlight-emitting diodes (LEDs) for use on a vehicle.

BACKGROUND OF THE INVENTION

Emblems and badges are commonly employed on vehicles to convey variousaesthetic and stylistic features, as viewed under ambient lightingconditions and when illuminated. They may also be used to display avehicle manufacturer's logos, names, trademarks or other graphics.Enhancements to the attractiveness of these badges or emblems may alsobe desirable.

The engineering and design of emblems and badges for use in a vehiclealso requires a consideration of various environmental factors. Theseunits should be sufficiently durable to maintain their attractivenessover the lifetime of the vehicle. In some cases, the emblems and badgesmay be used in an under-the-hood configuration and require additionaltemperature resistance.

Accordingly, there is a need for novel and improved illuminated emblemassemblies that are aesthetically pleasing under both ambient lightingand as-illuminated conditions, and possess environmental resistance.

SUMMARY OF THE INVENTION

One aspect of the present invention is to provide an illuminated emblemassembly that includes a power source, a backing member, and alight-producing assembly coupled to the power source and supported bythe backing member. The light-producing assembly includes a plurality oflight-emitting diode sources. The illuminated emblem assembly furtherincludes a translucent base region over the light sources, anindium-containing chromatic layer over the translucent base region, anda polycarbonate sealing structure that seals the backing member, thelight-producing assembly, and the chromatic layer.

Another aspect of the present invention is to provide an illuminatedemblem assembly that includes a power source, a backing member, and alight-producing assembly coupled to the power source and supported bythe member. The light-producing assembly includes a plurality oflight-emitting diode sources. The illuminated emblem assembly furtherincludes a translucent base region over the light sources, anindium-containing chromatic layer over the base region and a UV-stablepolycarbonate sealing structure over the chromatic layer that comprisesa design feature and seals the backing member, the light-producingassembly, and the chromatic layer.

A further aspect of the present invention is to provide an illuminatedemblem assembly that includes a power source, a backing member, and alight-producing assembly coupled to the power source and supported bythe backing member. The light-producing assembly includes a plurality ofdispersed light-emitting diode sources. The illuminated emblem assemblyfurther includes a translucent base region over the light sources, achromatic layer over the translucent base region, and a translucentsealing structure that seals the backing member, the light-producingassembly, and the chromatic layer.

An additional aspect of the present invention is to provide anilluminated emblem assembly that includes: a power source; alight-producing assembly that is coupled to the power source, supportedby a backing member and comprises a chromatic layer comprising an emblemshape over the light-producing assembly; and a polycarbonate sealingstructure over the chromatic layer that seals the backing member, thelight-producing assembly, and the chromatic layer. Further, the shape isvisible under ambient lighting.

Another aspect of the present invention is to provide an illuminatedemblem assembly that includes: a power source; a light-producingassembly coupled to the power source, supported by a backing member, andcomprises a chromatic layer over the light-producing assembly; and aUV-stable polycarbonate sealing structure over the chromatic layer thatcomprises a design feature and seals the backing member, thelight-producing assembly, and the chromatic layer.

A further aspect of the present invention is to provide an illuminatedemblem assembly that includes: a power source; a light-producingassembly that is coupled to the power source, supported by a backingmember, and comprises a chromatic layer over the light-producingassembly; and a translucent sealing structure over the chromatic layerthat comprises a design feature and seals the backing member, thelight-producing assembly, and the chromatic layer.

These and other aspects, objects, and features of the present inventionwill be understood and appreciated by those skilled in the art uponstudying the following specification, claims, and appended drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings:

FIG. 1 is a perspective view of the engine compartment of a vehicle(hood removed for clarity) with illuminated emblem assemblies mounted toan engine at various locations;

FIG. 1A is a perspective view of a vehicle with an illuminated emblemassembly mounted to the grill of the vehicle;

FIG. 2 is an enlarged, top-down perspective view of an illuminatedvehicle emblem assembly according to two embodiments;

FIG. 2A is a cross-sectional view of the illuminated vehicle emblemassembly shown in FIG. 2 along line IIA-IIA according to a firstembodiment;

FIG. 2B is a cross-sectional view of the illuminated vehicle emblemassembly shown in FIG. 2 along line IIB-IIB according to a secondembodiment;

FIG. 3 is a top-down perspective view of an illuminated vehicle emblemassembly, according to a third embodiment;

FIG. 3A is an exploded, perspective view of the illuminated vehicleemblem assembly shown in FIG. 3;

FIG. 3B is a cross-sectional view of the illuminated vehicle emblemassembly shown in FIG. 3 along line IIIB-IIIB;

FIG. 3C is an enlarged, cross-sectional view of the light sourceassembly contained in the illuminated vehicle emblem assembly shown inFIG. 3;

FIG. 4 is a top-down perspective view of an illuminated vehicle emblemassembly, according to a fourth embodiment;

FIG. 4A is an exploded, perspective view of the illuminated vehicleemblem assembly shown in FIG. 4;

FIG. 4B is a cross-sectional view of the illuminated vehicle emblemassembly shown in FIG. 4 along line IVB-IVB;

FIG. 5 is a top-down perspective view of an illuminated vehicle emblemassembly, according to a fifth embodiment;

FIG. 5A is an exploded, perspective view of the illuminated vehicleemblem assembly shown in FIG. 5;

FIG. 5B is a cross-sectional view of the illuminated vehicle emblemassembly shown in FIG. 5 along line VB-VB;

FIG. 6 is a top-down perspective view of an illuminated emblem assembly,according to a sixth embodiment;

FIG. 6A is an exploded, perspective view of the illuminated emblemassembly shown in FIG. 6;

FIG. 6B is a cross-sectional view of the illuminated emblem assemblyshown in FIG. 6 along line VIB-VIB;

FIG. 7 is a top-down perspective view of an illuminated emblem assembly,according to two embodiments;

FIG. 7A is an exploded, perspective view of the illuminated emblemassemblies shown in FIG. 7;

FIG. 7B is a cross-sectional view of the illuminated emblem assemblyshown in FIG. 7 along line VIIB-VIIB according to a seventh embodiment;

FIG. 7C is a cross-sectional view of the illuminated emblem assemblyshown in FIG. 7 along line VIIC-VIIC according to an eighth embodiment;

FIG. 8 is an enlarged, top-down perspective view of an illuminatedemblem assembly according to two embodiments;

FIG. 8A is a cross-sectional view of the illuminated emblem assemblyshown in FIG. 8 along line VIIIA-VIIIA according to a ninth embodiment;and

FIG. 8B is a cross-sectional view of the illuminated emblem assemblyshown in FIG. 8 along line VIIB-VIIB according to a tenth embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

For purposes of description herein, the terms “upper,” “lower,” “right,”“left,” “rear,” “front,” “top,” “bottom,” “vertical,” “horizontal,” andderivatives thereof shall relate to the invention as oriented in FIGS.2A and 2B. However, the invention may assume various alternativeorientations, except where expressly specified to the contrary. Inaddition, the specific devices and processes illustrated in the attacheddrawings, and described in the following specification, are simplyexemplary embodiments of the inventive concepts defined in the appendedclaims. Hence, specific dimensions and other physical characteristicsrelating to the embodiments disclosed herein are not to be considered aslimiting, unless the claims expressly state otherwise.

Referring now to FIG. 1, an engine compartment 3 of vehicle 1 isgenerally illustrated with its hood removed for clarity. Variousilluminated vehicle emblem assemblies 2, 2 a, 2 b, 2 c, 2 d are shownmounted to an engine 4 within the engine compartment 3. Vehicle 1 may bean automobile, truck, bus, van or other type of vehicle capable ofdisplaying illuminated vehicle emblem assemblies 2-2 d. As shown, theilluminated emblem assemblies 2-2 d are configured in various shapes anddesigns. Further, emblem assemblies 2-2 d are mounted to engine 4. Itshould be appreciated that emblem assemblies 2-2 d may be configured inany of a myriad of shapes and designs for use within engine compartment3, or in other interior locations within the vehicle 1. Under ambientlighting conditions, emblem assemblies 2-2 d exhibit a chrome-like ormirrored appearance under the hood of vehicle 1 within enginecompartment 3. More specifically, a chromatic layer 40 (and its shape,design and/or surface appearance) within the assemblies 2-2 d (see FIGS.2, 2A, 2B, 7-7C and 8-8B) can be viewed under ambient light conditions.Under low light or nighttime conditions, emblem assemblies 2-2 d areilluminated and their exterior surfaces appear with a uniform glow.

Vehicle emblem assemblies 2, 2 a, 2 b, 2 c, 2 d are coupled to a powersupply 22 via wiring 90 and controller 80, as also shown in FIG. 1.Controller 80 is arranged to control assemblies 2-2 d in thisconfiguration. Power supply 22 may be a standard vehicle battery, or aseparate battery or another power source within the vehicle. Whenvehicle emblem assembly 2-2 d is switched to an illuminated state bycontroller 80, power supply 22 provides the power necessary for theillumination. Vehicle emblem assembly 2-2 d may be switched to anilluminated state by the engagement of a manual switch (not shown), acontroller 80 (as shown in FIG. 1) operating according to apredetermined switching algorithm, or another suitable switchingconfiguration.

FIG. 1A generally depicts the front view of vehicle 1 and an illuminatedemblem assembly 2, 2 a, 2 b, 2 c, 2 d. Here, an emblem assembly 2-2 d ismounted to an exterior surface of vehicle 1, namely, grille 6. It shouldbe appreciated that emblem assemblies 2-2 d may be configured in any ofa myriad of shapes, sizes and designs for use on the exterior of vehicle1. These illuminated emblem assemblies 2-2 d also exhibit a chrome-likeor mirrored appearance when viewed under ambient lighting conditions(e.g., sunlight). Illuminated emblem assemblies 2-2 d mounted to theexterior surfaces of vehicle 1 appear with a uniform glow under lowlight or nighttime conditions. Further, these assemblies 2-2 d may bepowered and controlled in the same fashion as the illuminated emblemassemblies 2-2 d mounted in the engine compartment 3 of vehicle 1 (seeFIG. 1), or other interior locations within vehicle 1.

In FIG. 2, illuminated vehicle emblem assemblies 2, 2 a are depicted. Asshown in this schematic, vehicle emblem assembly 2 and 2 a include anencapsulation structure 50 and a backing member 10. Backing member 10 isconfigured to attach the illuminated emblem assembly 2 to a vehicle (notshown). Backing member 10 may be arranged as a plate, base or othersuitable supporting member to mount illuminated vehicle emblem assembly2, 2 a to the vehicle. Further, backing member 10 may be configured tomatch the shape, features and contours of the underlying surface of thevehicle 1 at the location specified for mounting the illuminated vehicleemblem assembly 2, 2 a.

Durable metals, polymers, alloys, composites and other suitablestructural materials may be employed for use as backing member 10,provided that they offer high durability under long-term (greater than10 years) ambient exposure and can be sealed with a water resistantbarrier to prevent moisture ingress within the emblem. For example, thebacking member 10 may comprise acrylonitrile butadiene styrene (ABS), acombination of polycarbonate and ABS, or other polymeric materials withsimilar properties. The backing member 10 may be opaque or mirrored toensure that the majority of the light generated by the illuminatedvehicle emblem assembly 2, 2 a is focused outward, away from thevehicle. Typically, backing member 10 is injection-molded or die cut,with a first thickness of approximately 1 to 3 mm. Other thicknesses arepossible depending on the desired aesthetics for the emblem assemblyand/or mounting needs. Preferably, backing member 10 is injection-moldedand possesses a thickness of approximately 2.5 to 3 mm.

Encapsulation structure 50 should be substantially translucent.Structure 50 should also provide a water-resistant seal between thebacking member 10 and the interior components of illuminated vehicleemblem assembly 2, 2 a. The encapsulation structure 50 comprisestranslucent polymeric materials and/or resins resistant todiscoloration, crazing, cracking and other deterioration associated withexposure to ambient air, sunlight and moisture. For example, theencapsulation structure 50 may comprise acrylic, nylon, polycarbonateand/or blends of these materials.

When illuminated vehicle emblem assemblies 2, 2 a are employed inapplications on the exterior of vehicle 1, a variety of polymericmaterials may be suitable for use as encapsulation structure 50. Thesematerials must be durable and not yellow, discolor, craze, crack orotherwise deteriorate under ambient, environmental conditions.Preferably, encapsulation structure 50 is comprised of an acrylicmaterial, nylon material, polycarbonate material or blend of thesematerials when the illuminated vehicle emblem assembly 2, 2 a is mountedto the exterior of (e.g., the grille) or interior (e.g., the steeringwheel) of vehicle 1. Most preferably, the encapsulation structure iscomprised of a UV-stable polycarbonate material when the assembly 2, 2 ais mounted to the exterior of vehicle 1. For example, encapsulationstructure 50 can comprise a blend of nylon and polycarbonateconstituents or primarily UV-stable polycarbonate material. Inparticular, these constituents may be blended at a ratio of 40 to 60%nylon to 40 to 60% polycarbonate by weight. As another example,encapsulation structure 50 can comprise a blend of nylon and polyestermaterials, particularly when assemblies 2, 2 a are employed in hightemperature environments such as the engine compartment 3 of the vehicle1. These constituents may be blended at a ratio of 40 to 60% nylon and40 to 60% polyester by weight.

In situations where illuminated vehicle emblem assembly 2, 2 a ismounted in the engine compartment 3 of vehicle 1 (FIG. 1), theencapsulation structure 50 must be durable under the increasedtemperatures associated with the operation of the engine 4. Thematerials used for encapsulation structure 50 therefore must be heatresistant and not subject to discoloration or other deterioration underthese conditions. Accordingly, encapsulation structure 50 may becomprised of acrylic materials or other plastic materials with highpercentages of acrylic.

In addition, glass particles may be mixed into encapsulation structure50 for added durability and temperature resistance. The glass particlesmay also provide additional light-scattering effects to further enhancethe attractiveness of the emblem assembly 2, 2 a. Still further, theencapsulation structure 50 may be coated with a curable, liquid-basedcoating that results in a translucent layer for added durability.

Encapsulation structure 50 may be fabricated according to variousmethods as known in the polymer processing art. For example,encapsulation structure 50 may be made using injection molding tools,equipment and processing conditions. Further, encapsulation structure 50is attached to the backing member 10 using various mechanical, chemicaland thermal techniques that provide a water-tight and durable sealbetween the member 10 and structure 50. These attachment techniquesinclude sonic welding, vibration welding, hot plate welding, rotationalwelding, and silicone joining.

FIGS. 2A and 2B provide a cross-sectional view of the illuminatedvehicle emblem 2, 2 a depicted in FIG. 2. Backing member 10 is coupled,bonded or otherwise attached to encapsulation structure 50, as discussedearlier. A light-producing assembly 20 is configured above backingmember 10. As depicted in FIGS. 2A and 2B, light-producing assembly 20is mounted directly to backing member 10. It should be appreciated thatlight-producing assembly 20 may be coupled to or otherwise reside abovebacking member 10.

As shown in FIGS. 2A and 2B, light-producing assembly 20 is also coupledto power supply 22 (also referred herein and the accompanying figures asa “power source”) via wiring 90 and controller 80. Controller 80operates to control the illuminated state(s) of vehicle emblem assembly2, 2 a as described in the embodiment depicted in FIG. 1.Light-producing assembly 20 relies on power from power supply 22 toprovide the illumination function of vehicle emblem assembly 2, 2 a. Thelight-producing assembly 20 may be fabricated with a thickness fromapproximately 0.1 mm to 3.1 mm. When activated, light-producing assembly20 generates light rays within illuminated vehicle emblem assembly 2, 2a. These light rays travel through the various structures within theemblem assembly 2, 2 a (including the chromatic layer 40) and exitthrough encapsulation structure 50. The light output from thelight-producing assembly is then viewed as a glowing, emanation of lightthrough a significant portion of the exterior surface area of vehicleemblem assembly 2, 2 a. In addition, some light from the emblem assembly2, 2 a may emanate around or near the edges of the backing member 10.

Various types of light sources 21 may be employed within light-producingassembly 20 to provide the illumination function. These light sources 21may include incandescent, LED, LED-sourced fiber optic, LED-sourcedlight pipe, dispersed LEDs and micro-sized LEDs, and electroluminescentlight-producing elements. Further, these light sources 21 may beconfigured within light-producing assembly 20 to provide white light orlight in various colors. In addition, color light filters and/or lensesmay be fitted within light source assembly 20 over light sources 21 togenerate configurations of various, desired colors, and shapes throughthe vehicle emblem assembly 2.

In the illuminated vehicle emblem assembly 2, depicted in FIG. 2A, atranslucent base region 30 is arranged over the light sources 21 andlight-producing assembly 20. Preferably, base region 30 is void space.However, base region 30 may also comprise any of a variety oftranslucent, polymeric materials that can be processed in situ toencapsulate and/or cover light sources 21 at temperatures and underconditions that will not damage them. When base region 30 consists ofsuch material, it provides additional sealing for the light-producingassembly 20 beneath it. Base region 30 may also be fabricated as aseparate part using injection molding tools, equipment and processingconditions, and then sealed over light-producing assembly 20 and lightsources 21 using known methods.

As shown in FIG. 2, the illuminated vehicle emblem assembly 2 a lacks abase region 30. However, in some embodiments of assembly 2 a, a smallair gap may be present between the chromatic layer 40 and thelight-producing assembly 20. As such, the chromatic layer 40 is over, ordirectly in contact with, the light-producing assembly 20 in the emblemassembly 2 a.

FIGS. 2A and 2B also illustrate the chromatic layer 40, arranged overthe base region 30 (e.g., as void space or translucent material) for theilluminated vehicle emblem assembly 2, and over the light-producingassembly 20 for the illuminated vehicle emblem assembly 2 a. Preferably,the chromatic layer 40 is partially transmissive on the visible lightspectrum. The chromatic layer 40 may be observed through the translucentencapsulation structure 50. Chromatic layer 40 gives illuminated vehicleemblem assembly 2, 2 a a chrome- or mirror-like appearance. Thisappearance is evident when light-producing assembly 20 is not activated,and/or under ambient lighting conditions. When the light-producingassembly 20 is activated, its light can pass through the chromatic layer40, thus providing a uniform, glowing appearance for the emblem assembly2, 2 a.

The chromatic layer 40 may be comprised of various metal particles,materials, coatings and/or paint that can produce the desired chrome- ormirror-like appearance. Chromatic layer 40 may take the form of a layer,multi-layer, film, coating or other suitable structure. It is to beunderstood, however, that chromatic layer 40 should be configured with atailored density of chromatic materials to ensure that light fromlight-producing assembly 20 can penetrate it when the illuminatedvehicle emblem assembly 2, 2 a is activated in an illuminated state.Materials that may be used in chromatic layer 40 include, but are notlimited to, automotive-grade metallic paint, automotive-grade silverpaint, and particles or flakes containing indium, silver, chromiumand/or aluminum. Preferably, chromatic layer 40 is comprised ofindium-containing and aluminum-containing particles.

Chromatic layer 40 may be deposited, formed and/or applied according tovarious methods known in the paint, coating and metallic layerdeposition art. One approach for forming the chromatic layer 40 is toemploy a coating preparation of the desired chromatic particles in awater, alcohol or other organic solvent-based suspension or solutionwith a spray coating apparatus. The chromatic layer preparation is thenused to apply multiple coatings of the chromatic particles or paint asthe chromatic layer 40 to or over the light-producing assembly 20 (e.g.,for the illuminated vehicle emblem assembly 2 a configuration), to thebase region 30 (e.g., if the base region 30 is a solid material in theilluminated vehicle emblem assembly 2 configuration) and/or to theunderside of encapsulation structure 50. Applying chromatic layer 40 tothe underside of the encapsulation structure 50 is a preferred approachin that it minimizes the incorporation of unwanted dust particles intothe layer 40. Other constituents may be added to the chromatic layer 40to promote bonding to these structures. The solvent, water or alcoholbase is then evaporated by curing (e.g., by UV light) or an ambientevaporation process, leaving the chromatic layer 40 adhered to thelight-producing assembly 20, base region 30 and/or encapsulationstructure 50. Another approach is to stress relieve the light-producingassembly 20, base region 30 and/or encapsulation structure 50 with arelatively low temperature heating or low level vibration process. Avoltage is then applied to the light-producing assembly 20, base region30 and/or encapsulation structure 50. The final step is to prepare aloading of the chromatic particles (e.g., indium-containing particles)and deposit the particles onto the electrified surface of thelight-producing assembly 20, base region 30 and/or encapsulationstructure 50.

A further approach to forming chromatic layer 40 is to vacuum metallizethe layer on encapsulation structure 50, base region 30 (e.g., for theilluminated vehicle emblem assembly 2 configuration) and/or thelight-producing assembly 20 (e.g., for the illuminated vehicle emblemassembly 2 a configuration). In this case, chromatic layer 40 iscomprised of chromium-, aluminum- or other metal-containing particles. Achromatic layer 40 formed by vacuum metallization may also be sealedwith a curable, polymeric translucent coating. In addition, chromaticlayer 40 may be formed in situ with encapsulation structure 50. Forexample, chromatic layer 40 could comprise a metallized polymeric film(e.g., a polyethylene terephthalate film) that is draped over aninjection mold or cut to the dimensions of such a mold duringfabrication of encapsulation structure 50.

Also depicted in FIGS. 2A and 2B is the encapsulation structure 50. Asdescribed earlier, encapsulation structure 50 is translucent andprovides a water-resistant seal between the backing member 10 and theinterior components of illuminated vehicle emblem 2, 2 a. Encapsulationstructure 50 also seals the light-producing assembly 20, and chromaticlayer 40 from the ambient environment. The sealing function ofencapsulation structure 50 is particularly important to ensure thatexcess moisture does not penetrate and cause a short circuit to thelight-producing assembly 20 and light sources 21.

FIGS. 3-8B depict additional embodiments of the illuminated vehicleemblem assembly 2. In general, each of these embodiments can beconfigured according to the schematic and description of the emblemassembly 2, as shown in FIGS. 2 and 2A with light sources 21. However,each of the embodiments depicted in FIGS. 3-8B relies on a certain typeof light source within light-producing assembly 20, essentially as asubstitute for the light sources 21 shown in FIGS. 2 and 2A for emblemassembly 2. It is to be understood that various light sources other thanthose described here may be employed in light-producing assembly 20, asdepicted in FIGS. 2-8B, to the same or similar effect.

Referring to FIGS. 3, 3A, 3B and 3C, an embodiment of illuminatedvehicle emblem assembly 2 is depicted with a light-producing assembly 20containing an electroluminescent light source assembly 60. Theilluminated vehicle emblem assembly 2 is otherwise configured asdescribed in connection with the emblem assembly 2 depicted in FIGS. 2and 2A. Optionally, design features 100 may be embedded withinencapsulation structure 50, as shown. These features may be fabricatedof various materials as known in the art. Further, the features 100 maybe translucent, tinted or opaque.

Electroluminescent light source assembly 60 is to be configuredaccording to a multi-layer structure that produces light throughelectroluminescence. Preferably, electroluminescent assembly 60 isarranged as shown in FIG. 3C. A carbon layer 62 is arranged on phosphorlayer 64. Carbon layer 62 is coupled to a power supply 22 (see FIG. 3B)and serves as a first electrode in the electroluminescent assembly 20configuration. The phosphor layer 64 may comprise aluminum and silvernitrate materials. A die eyelet structure 66 is arranged under thephosphor layer 64. Finally, a transparent electrode 67 is coupled topower supply 22 and configured under die eyelet structure 66.Transparent electrode 67 may be comprised (as shown in FIG. 3C) of twolayers: an indium tin oxide layer 68 and an antimony-tin-zirconium oxidelayer 69. Transparent electrode 67 may also be configured with othersuitable transparent electrode materials and configurations.

As depicted in FIGS. 4, 4A and 4B, a further embodiment of illuminatedvehicle emblem assembly 2 is depicted with a light-producing assembly 20that contains light emitting diode (LED) sources 26. LED sources 26 mayalso be configured within light-pipe arrangements (not shown). One ormore LED sources 26 may be configured within light-producing assembly20. Further, LED sources 26 are coupled to, and obtain power for theirillumination function from, power supply 22 (see FIG. 4B). It should beappreciated that various types of LED sources, including those thatemanate light of different colors, may be employed in this embodiment.The illuminated vehicle emblem assembly 2 shown in FIGS. 4, 4A and 4B isotherwise configured as described in connection with the schematic ofthe emblem assembly 2 depicted in FIGS. 2 and 2A.

An additional embodiment of illuminated vehicle emblem assembly 2 isdepicted in FIGS. 5, 5A and 5B with a light-producing assembly 20containing fiber optic light cables 28. One or more fiber optic lightcables 28 may be configured within light-producing assembly 20. Inaddition, the fiber optic light cable(s) 28 are coupled to, and obtainpower for their illumination function from, power supply 22 (see FIG.5B). Further, slits 29 are provided in fiber optic light cables 28 toensure that light rays produced within the cables 28 are directedoutward through base region 30, chromatic layer 40 and encapsulationstructure 50. It should be understood that various types of fiber opticlight cables 28, including those that emanate light of different colors,may be employed in this embodiment. The illuminated vehicle emblemassembly 2 shown in FIGS. 5, 5A and 5B is otherwise configured asdescribed in connection with the schematic of emblem assembly 2 depictedin FIGS. 2 and 2A.

Referring to FIGS. 6, 6A and 6B, an embodiment of illuminated vehicleemblem assembly 2 is depicted with a light-producing assembly 20 thatcontains incandescent light bulbs 24. One or more incandescent lightbulbs 24 are configured within light-producing assembly 20. Further, thelight bulbs 24 are coupled to and obtain power for their illuminationfunction from power supply 22 (see FIG. 6B). It should be appreciatedthat various types of incandescent light bulbs and filters, includingthose that emanate light of different colors, may be employed in thisembodiment of illuminated vehicle emblem assembly 2. The illuminatedvehicle emblem assembly 2 shown in FIGS. 6, 6A and 6B is otherwiseconfigured as described in connection with the schematic of the emblemassembly 2 depicted in FIGS. 2 and 2A.

Additional embodiments of the disclosure are directed to illuminatedemblem assemblies 2 c, 2 d, as depicted in FIGS. 7, 7A, 7B and 7C. Theemblem assemblies 2 c, 2 d are generally configured the same as theemblem assembly 2 depicted in FIGS. 4, 4A and 4B, with like-numberedelements having the same or comparable function and structure. However,emblem assemblies 2 c, 2 d possess additional attributes and features.In the emblem assembly 2 c, 2 d, the light-producing assembly 20contains a plurality of micro-sized light-emitting diode (LED) sources26 a. These LED sources 26 a are arranged within a semiconductor ink 26d. Further, a positive electrode 26 c is electrically connected to atleast a portion of the LED sources 26 a, and the controller 80 and thepower source 22 via wiring 90. Preferably, the positive electrode 26 ccomprises a conductive epoxy, such as a silver-containing orcopper-containing epoxy. The positive electrode 26 c is arranged over asubstrate 10 a, preferably comprising a polyethylene terephthalate (PET)material on the order of 0.010 to 0.040 inches thick. Further, thesubstrate 10 a is located above the backing member 10. Similarly, anegative electrode 26 b is electrically connected to at least a portionof the LED sources 26 a, and the controller 80 and the power source 22via wiring 90. Preferably, the negative electrode 26 b comprises atransparent or translucent conductive material such as indium tin oxide.

As depicted in FIGS. 7B and 7C, the micro-sized LED sources 26 a of theilluminated vehicle emblem assemblies 2 c, 2 d can be dispersed in arandom or controlled fashion within the semiconductor ink 26 d. Themicro-sized LED sources 26 a can comprise gallium nitride elements onthe order of 20-30 μm in size, and the semiconductor ink 26 d caninclude various binders and dielectric material including but notlimited to one or more of gallium, indium, silicon carbide, phosphorousand/or translucent polymeric binders. As such, thousands or more ofmicro-sized LED sources 26 a can be contained in the ink 26 d. In someembodiments, these LED sources 26 a and semiconductor ink 26 d aresourced from Nth Degree Technologies Worldwide Inc. The ink 26 dcontaining the LED sources 26 a can be applied through various printingprocesses, including ink jet and silk screen processes to selectedportion(s) of the substrate 10 a. More specifically, it is envisionedthat the LED sources 26 a are dispersed within the ink 26 d, and shapedand sized such that a substantial quantity of them preferentially alignwith the positive and negative electrodes 26 c and 26 b duringdeposition of the ink 26 d. The portion of the LED sources 26 a thatultimately are electrically connected to the electrodes 26 b and 26 ccan be illuminated by the combination of the power source 22, controller80 and wiring 90. In some aspects, a power source operating at 12 to 16VDC from a vehicular power source (without the need for a transformer)can be employed for power source 22 to illuminate the micro-sized LEDsources 26 a.

Still referring to FIGS. 7, 7A and 7B, the illuminated vehicle emblemassembly 2 c also includes a translucent base region 30 over the lightsources 26 a and the light-producing assembly 20. In particular, thetranslucent base region 30 is employed over the light-producing assembly20 to protect and seal it from the environment, including moisture. Assuch, the base region 30 can be configured to encapsulate thelight-producing assembly 20 containing the plurality of LED sources 26a.

Alternatively, as referring to FIGS. 7, 7A and 7C, the illuminatedvehicle emblem assembly 2 d lacks a base region 30. However, in someembodiments of assembly 2 d, a small air gap may be present between thechromatic layer 40 and the light-producing assembly 20. As such, thechromatic layer 40 is over, or directly in contact with, thelight-producing assembly 20 in the emblem assembly 2 d.

With further regard to the illuminated vehicle emblem assemblies 2 c, 2d depicted in FIGS. 7-7C, it should be understood that these assembliesalso include a chromatic layer 40 with the same structure, function andprocessing as the like-numbered, chromatic layer 40 employed in theilluminated vehicle emblem assemblies described earlier (see FIGS.2-2B). In particular, FIGS. 7-7C illustrate that the chromatic layer 40,can be arranged over the base region 30 (e.g., as void space ortranslucent material) for the illuminated vehicle emblem assembly 2 c,and over the light-producing assembly 20 for the illuminated vehicleemblem assembly 2 d. Preferably, the chromatic layer 40 is partiallytransmissive on the visible light spectrum. The chromatic layer 40 maybe observed through the translucent encapsulation structure 50.Chromatic layer 40 gives illuminated vehicle emblem assembly 2 c, 2 d achrome- or mirror-like appearance. This appearance is evident whenlight-producing assembly 20 is not activated, and/or under ambientlighting conditions. When the light-producing assembly 20 is activated,its light can pass through the chromatic layer 40, thus providing auniform, glowing appearance for the emblem assembly 2 c, 2 d.

During operation of the illuminated vehicle emblem assembly 2 c, 2 ddepicted in FIGS. 7-7C, the LED sources 26 a can be illuminated by thecontroller 80 and the power source 22. When activated, the LED sources26 a provide small pixels of light that shine through the chromaticlayer 40. Given the relatively random nature of the orientation andspacing of the sources 26 a, and their relatively small size,interesting lighting effects can be produced, particularly in connectionwith the chromatic layer 40. When the LED sources 26 a within thelight-producing assembly 20 are not activated, the assembly 2 c, 2 dexhibits a mirror-like appearance by virtue of the chromatic layer 40.The mirror-like appearance is also consistent with the shape of thelayer 40, as viewed through the encapsulation structure 50. As depictedin FIGS. 7, 7A, 7B and 7C, the emblem assembly 2 c, 2 d also may includedesign features 100 that are contained within or otherwise surrounded bythe encapsulation structure 50. These design features 100, which may insome cases also exhibit a mirror-like appearance, are also visiblethrough the encapsulation structure 50 when the LED sources 26 a are ina dormant state.

In some aspects of the illuminated vehicle emblem assembly 2 c, 2 d, asdepicted in FIGS. 7-7C, a light-diffusing layer 40 a is employed betweenthe chromatic layer 40 and the translucent base region 30 (e.g., forilluminated vehicle emblem assembly 2 c) and between the chromatic layer40 and the light-producing assembly 20 (e.g., for illuminated vehicleemblem assembly 2 d). The light-diffusing layer 40 a diffuses the lightemanating from each of the sources 26 a connected to the electrodes 26 band 26 c to provide a more uniform glow through the chromatic layer 40.Such a uniform glow from an assembly 2 c, 2 d containing alight-diffusing layer 40 a may be preferable to the more pixelatedappearance of an assembly 2 c, 2 d that lacks the light-diffusing layer40 a.

Referring now to FIGS. 8, 8A and 8B, a further embodiment of thedisclosure is depicted in the form of illuminated emblem assembly 2 c, 2d configured in the shape of a logo. Here, the emblem assembly 2 c, 2 dpossesses virtually the same structure as the respective emblemassemblies 2 c, 2 d depicted in FIGS. 7, 7A, 7B and 7C. The chromaticlayer 40 is configured in a particular shape such that the shape isviewable through the encapsulation structure 50 when the light-producingassembly 20 and LED sources 26 a are inactive. Notably, theencapsulation structure 50 surrounds the chromatic layer 40 and issealed to the backing member, thus protecting them from the environment.

It should be appreciated that the foregoing embodiments of illuminatedvehicle emblem assembly 2, 2 a, 2 b, 2 c, 2 d, and variants of theseembodiments, can be employed in various shapes, styles andconfigurations throughout engine compartment 3, and the interior andexterior of vehicle 1. In particular, the backing member 10 and/orencapsulation structure 50 can be employed in these shapes, styles andconfigurations. Further, design features 100, such as those employed inthe emblem assembly 2 depicted in FIG. 3B, may be embedded withinencapsulation structure 50. Under ambient conditions, these designfeatures 100 can appear with a chrome- or mirror-like finish, enhancingthe attractiveness of the shape, logo or other graphics evident in theemblem assembly 2-2 d via the appearance of chromatic layer 40. Further,these emblem assemblies 2-2 d may be illuminated by the use of manualswitches or other types of controller-driven configurations under lowlight or nighttime conditions. It is also possible to configure thepower supply 22 and wiring arrangement 90 coupled to the light-producingassembly 20 for increased illumination flexibility. Variable intensitylighting options may be employed as light sources 21 in thelight-producing assembly 20 including, but not limited to, LEDs,electroluminescent arrays, fiber optic cables and incandescent bulbs. Avehicle emblem assembly 2-2 d configured with variable intensity lightsources 21 can be adjusted to produce interesting lighting effects thatcomplement its chrome- or mirror-like finish.

Accordingly, the illuminated vehicle emblem assemblies 2, 2 a, 2 b, 2 c,2 d possess many features that are advantageous in automotiveapplications. For example, the features that provide the chrome- ormirror-like appearance in the emblem assemblies 2-2 d are protected fromthe outside environment by the encapsulation structure 50. The chromaticlayer 40 and light-producing assembly 20 elements are less susceptibleto peeling, flaking and other deterioration. In addition, the glowingappearance of the vehicle emblem assemblies 2-2 d (when activated in anilluminated state) should not be distracting to vehicle operatorscompared to other, directional lighting sources employed by many othervehicle components. Still further, most of the lighting options for thelight sources 21 use little power and can be supported by standardvehicle batteries. Hence, the illuminated vehicle emblem assemblies 2-2d can be arranged at various locations on the vehicle 1, requiring awiring connection to the main power bus of the vehicle.

Variations and modifications can be made to the aforementioned structurewithout departing from the concepts of the present invention, andfurther such concepts are intended to be covered by the following claimsunless these claims by their language expressly state otherwise.

We claim:
 1. An illuminated emblem assembly for an engine compartment,comprising: a power source; a light-producing assembly that is coupledto the power source, supported by a backing member, and comprises (a) achromatic layer comprising an emblem shape over and in contact with thelight-producing assembly and (b) a plurality of randomly orientedlight-emitting diode sources; and a polycarbonate sealing structure overthe chromatic layer that seals the backing member, the light-producingassembly, and the chromatic layer, wherein the shape is visible underambient lighting.
 2. The emblem assembly according to claim 1, whereinthe backing member is mounted to a vehicle.
 3. The emblem assemblyaccording to claim 2, wherein the backing member is mounted to alocation within the engine compartment of the vehicle and thetranslucent sealing structure comprises a blend of nylon andpolycarbonate material at a ratio of 40 to 60% nylon to 40 to 60%polycarbonate material by weight.
 4. The emblem assembly according toclaim 1, wherein the sealing structure comprises a design feature.
 5. Anilluminated emblem assembly for an engine compartment, comprising: apower source; a light-producing assembly coupled to the power source,supported by a backing member, and comprises (a) a chromatic layer overand in contact with the light-producing assembly and (b) a plurality ofrandomly oriented light-emitting diode sources; and a UV-stablepolycarbonate sealing structure over the chromatic layer that comprisesa design feature and seals the backing member, the light-producingassembly, and the chromatic layer.
 6. The emblem assembly according toclaim 5, wherein the backing member is mounted to a vehicle.
 7. Theemblem assembly according to claim 6, wherein the backing member ismounted to a location within the engine compartment of the vehicle andthe translucent sealing structure comprises a blend of nylon andpolycarbonate material at a ratio of 40 to 60% nylon to 40 to 60%polycarbonate material by weight.
 8. An illuminated emblem assembly foran engine compartment, comprising: a power source; a light-producingassembly that is coupled to the power source, supported by a backingmember, and comprises (a) a chromatic layer over and in contact with thelight-producing assembly and (b) a plurality of randomly orientedlight-emitting diode sources; and a translucent sealing structure overthe chromatic layer that seals the backing member, the light-producingassembly, and the chromatic layer.
 9. The emblem assembly according toclaim 8, wherein the backing member is mounted to a vehicle.
 10. Theemblem assembly according to claim 8, wherein the backing member ismounted to a location within the engine compartment of a vehicle and thetranslucent sealing structure comprises a blend of nylon andpolycarbonate material at a ratio of 40 to 60% nylon to 40 to 60%polycarbonate material by weight.
 11. The emblem assembly according toclaim 8, wherein the light-producing assembly further comprises anegative electrode layer, a positive electrode layer and a dielectricregion, each in electrical contact with at least a portion of theplurality of randomly oriented light-emitting diode sources.
 12. Theemblem assembly according to claim 11, wherein the light-emitting diodesources are micro-sized light-emitting diode elements that comprisegallium nitride.
 13. The emblem assembly according to claim 12, whereinthe micro-sized light-emitting diode elements are arranged on thepositive electrode layer in the form of an ink.
 14. The emblem assemblyaccording to claim 8, wherein the sealing structure comprises a designfeature.